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Renewable energy is extremely intermittent which means that it is not only difficult to forecast but the variation in availability affects the frequency and therefore the overall stability of the grid.

Everyone knows that due to it’s fluctuating availability it is almost impossible to forecast the dispatching potential of renewable energy.CERC has not stated that developer are to start forecasting their dispatchable power.Thankfully there are now tools available that monitor weather patterns and history in order to forecast on a day ahead basis.

2.
Background of the Project
• NAPCC’s ambitious target of 15% Renewable Energy by 2020
• But Grid is already facing tough time in assimilating highly
intermittent RE Power
• PowerGrid is determined to set up a SMART Transmission
GRID
• Special Task Force-Smart Grid Department of Power Grid has
taken initiative of seamless integration of RE into the Grid.
• Solutions to be Tested in India’s First SMARTGRID PILOT
PROJECT in Puducherry.
“Last year’s grid failure was primarily due to lack of grid discipline. A lot of
work has since been done. With the narrowing of frequency band & application
of Energy Storage-the load management will be strengthened and become
stricter,” said R.N. Nayak, chairman and managing director of Power Grid
Corp. of India Ltd (PGCIL).

3.
Need Of The Project: RE Integration to the Grid
• Intermittency of RE and its
corresponding impact on prices;
• Transmission availability and cost
of transmission expansion;
• Timing of generation and correlation
of RE with the demand (essentially
the net demand in the system);
• Impact on plant load factors(PLF) of
other resources in the system (and
hence the average costs of such
resources);
• Step changes in generation and
corresponding impact on grid
management;
• Risks on account of the above and
its corresponding impact on the
investment climate for RE.
Intermittency
Grid Security
Low Capacity
Utilization
Enabling RE
forecasting

5.
Wind Generation
Fluctuations
Solar Power
Fluctuations
Technical Challenges of integrating RES/DERs
Because of high seasonality we loose huge amount of Power, Generated from RE Plant at
their Peak Time because of Transmission Unavailability

6.
Forecasting
• CERC has set the target at +/-30%
for day ahead. Otherwise generators
will be susceptible to UI charges.
(Generators are resisting)
• In Germany it is the responsibility of
the System Operator.
• Forecasting allows for system
planning.
Tools:
• Tools usually integrate customized
numerical weather prediction models
with thousands of real-time surface
observations.
Forecasting

22.
• Thermal Storage:
7.5 hours. (2) tank (28,500 ton
storage) indirect molten salt
energy storage for each plant
• Cost:
$1.235 billion (AS-1 confirmed
cost of $411.69 million)
• Andasol Solar Power costs about
11% less to produce than it would
have, without storage.
• MSES will suffer storage system
energy losses of only 5%
Storage Cost & Savings
• Andasol-1 will generate 178,000
MWh/year, whereas a similar
power plant without storage
would generate only 117,000
MWh
• A difference worth as much as
$36 million at today’s electricity
prices
• 7.5 hours of a MSES brings down
the project’s LCOE while also
dramatically increasing project
capacity to 38.8%
Solar Millennium’s Andasol Solar Power Station is the world’s largest and first
commercial-scale solar CSP power plant to combine parabolic trough solar CSP with
MSES technology; able to store 7.5 hours worth of solar thermal energy and boosting
plant capacity to 38.8%
Andasol Solar Power Station, SPAIN

25.
Day Ahead Market
•Used by Open
Access
consumers, DisCo
ms to balance
supply and
demand.
•Generators
usually sell what
remains as unsold
capacity from
LTPPAs and
STPPAs
•Clears 1 day
before dispatch of
power.
•Operational in
India
Intraday Market
•Allows for
adjustments
after the
closure of the
day-ahead
market
generally up
to 3 hrs
before
dispatch.
•Operational
in India but
with very low
volumes.
Ancillary
services Market
•Used by
system
operators to
resolve any
remaining
imbalances.
•Frequency
Regulation
•Primary, Se
condary
•Voltage
Regulation
•Black Start
Ancillary Services Not yet operational but with EES in Place will
accelerate creation of it
Development & Creation of New Market

28.
Basic Information
• It’s a Model of 5 MW RE Plant with 2 MW Storage Capacity
• In this model all the Tariff calculation is without Tax Subsidy
• There are altogether 11 types Storage Technology considered for the model
• All other financial assumptions is as per CERC Guidelines
How it Operates
• Plant Operator, with the help of Storage, can control the energy output i.e. store
during off-peak hours & sell at peak hours thus can earn extra revenue
• Second, energy storage help to reduce the net cost of transmission by increasing
the reliability of power sales by storing power when the local system is fully
loaded
• Lowers the Network congestion charge imposed on Tariff to end consumer
• There exists the possibility of even using the energy storage facility to simply
arbitrage grid power by pulling in power from the grid during periods of no
Sun/Wind and selling that during peak demand periods
• The Project under Case-II & III qualifies for CDM
Model Framework- The Approach
Harness the Lost Renewable Energy & improves CUF

29.
CASE-I
Business-
as-Usual
A Solar/Wind
Plant Model
@ Cost+
Tariff
CASE-II
RE
+
Storage
Even with
Storage Tariff
remains
same as
Case-I
CASE-III
RE
+
Storage
A Special Case
Plant with
Storage for
Competitive
Bidding
RE Plant like Wind, 80% of the Generation is during 20% of the year. There by
leading to underused Asset-Utilization at off-season and over strained at Peak
Financial Model-Different Situations

34.
Recent News on the Same Frontline
In a discussion paper, the country’s apex power sector regulator has suggested a grid
frequency band of 49.95Hz to 50.05Hz. The current band is between 49.7Hz and 50.2Hz.
State like Tamilnadu has already got 41% of the Power from
RE whereas Germany Targets 50% RE by 2050From 6 p.m. to 10 p.m., Rs 7.80 per unit, which is 20% more than normal. During lean
period from 10 p.m. to 6 a.m. pay only 90 per cent of the normal, i.e. Rs 5.85 a unit
McKinsey recently identified 12 technologies that could
lead to a $20 trillion to $30 trillion economic impact on
the world in 2025. ET outlined these 12 technologies and
unpacks the role they could play in India

35.
RECOMMENDATIONS ADDRESSED TO POLICY-MAKERS AND REGULATORS
• Support for development of conventional storage
• Have Visions towards Long-term storage, on the order of months
• Cooperation between energy sectors; coherent regulations(e.g Bidirectional PPA)
• Incentives for development and operation of storage
• Public policy for and investment in storage research
• Potential barriers to the introduction of micro grids.
• Regulations for the safety of new storage technologies
• Environmental regulations for new storage technologies
RECOMMENDATIONS ADDRESSED TO RESEARCH INSTITUTIONS AND COMPANIES
CARRYING OUT R&D
• R&D targeted to low-cost materials and manufacturing
• Research on renewable’ interactions with storage
• R&D on hydrogen and Li-ion used for EES
• Development of versatile storage management systems
• Development of local storage for grid use
• Development of vehicle-to-grid and vehicle-to-home
“RECOMMENDATIONS”